When you apply a force to a rubber band, it changes shape and then returns to its previous shape when you remove the force.
What change would happen to a rubber band when force is applied on it?It is solid in nature, but because to the elastic nature of the rubber band, it may change shape when force is applied. For modest applied forces, the stretching action of rubber bands follows Hooke's Law, F=k x.
The limit of force for which the rubber band obeys Hooke's law is determined by the band's physical parameters, such as cross-sectional area. The stronger the attraction, the longer it lasts. In other words, a greater force causes the rubber band to stretch further.
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describe the abundance of silicate minerals and list commom rock forming silucate minerals
Answer:
The silicates, owing to their abundance on Earth, constitute the most important mineral class. Approximately 25 percent of all known minerals and 40 percent of the most common ones are silicates; the igneous rocks that make up more than 90 percent of Earth's crust are composed of virtually all silicates. The vast majority of the minerals that make up the rocks of Earth's crust are silicate minerals. These include minerals such as quartz, feldspar, mica, amphibole, pyroxene, olivine, and a great variety of clay minerals.
Explanation:
Please help! Ty
How many protons, neutrons,
and electrons are in this ion?
31 P3-
15
A. 15 p+, 16 nº, 18 e
B. 16 pt, 15 nº, 19 e
C. 15 pt, 16 nº, 15 e-
D. 15 pt, 16 nº, 12 e-
Explanation:
The symbol P represents the element phosphorus, which has an atomic number of 15, indicating that it has 15 protons in the nucleus. The ion is negatively charged with a 3- charge, which means it has three more electrons than protons.
To find the number of neutrons in an atom or ion, you need to know its mass number, which is the sum of protons and neutrons. Since the charge of the ion is not related to its mass, we can assume that the mass number is the same as that of the neutral phosphorus atom, which is approximately 31.
So, the number of protons, neutrons, and electrons in the P3- ion is:
Protons: 15
Neutrons: 31 - 15 = 16
Electrons: 15 + 3 = 18
Therefore, the P3- ion has 15 protons, 16 neutrons, and 18 electrons.
What is the pH 0f 10^-4 moles of HCl
The answer for this question would be pH=3.0
Hope this helps :)
pH of HCl solution is 4.
What is pH?pH may be defined as a measure of free acidity.
More precisely, pH is defined as the negative log of the hydrogen ion concentration.
pH = - log [H⁺]
The range of pH extends from zero to 14.
A pH value of 7 is neutral, because pure water has a pH value of exactly 7. Values lower than 7 are acidic; values greater than 7 are basic or alkaline.
Given,
Moles of HCl = 10⁻⁴
We know that, pH = - log [H⁺]
pH = - log (10⁻⁴)
pH = 4
Therefore, H⁺ concentration in a solution with a pH of 3.75 is 1.7 × 10⁻⁴
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K2CO3 in a solution if 17. 8 grams K2CO3 is dissolved in enough water to make 546 g of solution?
The concentration of K2CO3 (Potassium carbonate) in the solution is 0.000235 M.
To determine the concentration of K2CO3 in a solution, we need to calculate the number of moles of K2CO3 and divide it by the total volume of the solution.
First, let's calculate the number of moles of K2CO3:
molar mass of K2CO3 = 2(39.1 g/mol) + 12.0 g/mol + 3(16.0 g/mol) = 138.2 g/mol
moles of K2CO3 = 17.8 g / 138.2 g/mol = 0.1287 mol
Next, let's calculate the total volume of the solution:
total mass of solution = 546 g
Assuming the density of the solution is 1 g/mL, we can find the volume of the solution:
volume of solution = 546 mL
Finally, we can calculate the concentration of K2CO3:
concentration of K2CO3 = moles of K2CO3 / volume of solution
= 0.1287 mol / 546 mL
= 0.000235 M
Therefore, the concentration of K2CO3 in the solution is 0.000235 M.
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What mass of water in kg must evaporate in order for the person's body temperature to remain constant? use the enthalpy of vaporization of water at 298k is 44. 016 kj mol-1
The mass of water in kg must evaporate in order for the person's body temperature to remain constant is 0.0243 kg.
Internal energy, which emerges from the molecular state of motion of matter, is an energy form inherent in all systems. Internal energy is represented by the symbol U, and the unit of measurement is the joule (J).
Let mass of the body be x
We have,
enthalpy = 44.016 kj mol-1
Temperature be 298 K
As ideal gas,
Δ = 44.016 - x/18 x 8.314 x 10⁻³ x 298 K
40.66 = 44.016 - x/18
-3.356 x 10³/8.314 x 298 = x/18
-1.35 = x/18
x = 24.3 g
So the amount of water be 0.0243 kg.
Internal energy increases when temperature rises and states or phases transition from solid to liquid and liquid to gas. Planetary bodies can be viewed as hybrids of heat reservoirs and heat engines. Internal energy E is stored in the heat reservoirs, and heat engines transform some of this thermal energy into mechanical, electrical, and chemical energies.
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Sodium will react with chlorine to form sodium chloride (NaCl). Another cation, magnesium, will also react with chlorine to form magnesium chloride.
Answer:
See explanation below
Explanation:
Sodium will react with chlorine to form sodium chloride NaCl.
Na is a group I metal with 1 valance electron to become one Na+ ion to bond with one Cl- ion
Magnesium will also react with chlorine to form magnesium chloride MgCl2
Mg is a group II metal with 2 valence electrons become one Mg2+ ion to bond with two Cl- ions.
Both Na and Mg are metals while Cl is non-metals so the bond between metal and non-metal is ionic bond.
Hope this helps.
How is paper a insulator but it burna when theres fire
Which of the following atoms would
share properties and number of
electrons in their outermost energy
level?
a. Ne, Ar, and Kr
c. Si, As, and Sb
b. Li, Ca, and Mg
d. P, S, and Cl
Ne, Ar, and Kr share properties and the number of electrons in their outermost energy level because they belong to the same group (noble gases). Therefore, option A is correct.
What are noble gases and their properties?Any of a class of rare gases with high stability and very low reaction rates, such as helium, neon, argon, krypton, xenon, and occasionally radon. also known as the inert gas.
Noble gases are low chemically reactive, odorless, colorless, nonflammable, and monotonic gases. Noble gases are exceedingly stable and unlikely to form chemical connections since they have the minimal inclination to receive or lose electrons. Hence, option A is correct.
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Do you think that everyone in your community has access to adequate sanitation? Why or why not?
How would you name this?
*Grade 12 organic chemistry*
According to IUPAC nomenclature, the longest chain of this compound contains 7 carbons. Hence, the name of this compound is 4 -propyl-5-ethyl-5-phenyl heptane.
What is IUPAC nomenclature?IUPAC rules are used to name the organic compounds. As per this rule, the compound is named based on the chain containing highest number of carbon atoms. The substituents are named with their prefix or suffix.
For the given compound, the longest chain contains 7 carbon atoms. Hence, the chain is named as heptane. The substituents are numbered in such a way that, they have the least possible number.
The 4th carbon contains a propyl group and a phenyl group and ethyl groups are attached on the 5th position in the longest chain. Therefore, the name of the compound is 4 -propyl-5-ethyl-5-phenyl heptane.
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How many grams of ammonia are produced from 80.0 liters of hydrogen. ILL GIVE BRAINLIST!!!
80.0 liters of hydrogen gas at STP can produce 37.1 grams of ammonia.
What is the mass of ammonia produced?To answer this question, we need to know the balanced chemical equation for the reaction between hydrogen and ammonia:
N2 + 3H2 → 2NH3
From this equation, we can see that 3 moles of hydrogen are required to produce 2 moles of ammonia.
Now, we need to convert 80.0 liters of hydrogen to moles. We can use the ideal gas law to do this:
PV = nRT
where;
P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.Assuming standard temperature and pressure (STP), which is 0°C (273 K) and 1 atm, respectively, we can use the following values:
P = 1 atmV = 80.0 LT = 273 KR = 0.08206 L·atm/mol·KPlugging these values into the ideal gas law, we get:
n = PV/RT = (1 atm)(80.0 L)/(0.08206 L·atm/mol·K)(273 K)
n = 3.27 moles of H2
Now, we can use the stoichiometry of the balanced equation to determine the number of moles of NH3 produced:
3 moles of H2 produces 2 moles of NH3
Therefore, 3.27 moles of H2 produces:
(2 moles of NH3 / 3 moles of H2) x 3.27 moles of H2 = 2.18 moles of NH3
Finally, we can use the molar mass of NH3 to convert moles to grams:
2.18 moles of NH3 x 17.03 g/mol = 37.1 g of NH3
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islare a component of food that your body requires large amounts of to support your survival.
If Jake have type 1 diabetes then he needs insulin cells because his body cannot make insulin protein.
What is diabetes?
Diabetes is a chronic, metabolic disease characterized by elevated levels of blood glucose (or blood sugar), which leads over time to serious damage to the heart, blood vessels, eyes, kidneys and nerves.
The most common diabetes symptoms experienced by many people with diabetes are increased thirst, increased urination, feeling tired and losing weight. In Type 1 diabetes, body cannot make insulin whereas in type 2 diabetes, body can make insulin but can't use it properly.
Therefore, if Jake have type 1 diabetes then he needs insulin cells because his body cannot make insulin protein.
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PLEASE HELP
How many liters of CO2 are produced when 48.92g CaCO3 decomposes?
Explanation:
OK thank you so much I hope you are well
Determine if the following reaction is a redox reaction; if it is, select the correct overall oxidation-reduction reaction. (You may need to use Tables A-1, A-2, A-3, and A-4 in your CRG for oxidation numbers.)
N2(g) + 3H2(g) - 2NH3(g)
Indeed, 2N + 2H results from n2 + 3H2.An oxidation reaction is a process that involves chemical addition of oxygen, and a reduction reaction is a process that involves a removal of oxygen.
How can you tell if a response is redox in nature?Redox reactions are those in which there is a change in the oxidation number, with both a gain and a drop in number.The reaction called non-redox if this fails to take place.
How can a redox reaction be differentiated between oxidation and reduction?You must figure out each atom's oxidation values prior to and following the reaction in order to identify what happens toward which elements inside a redox reaction.The prospective charge of the an atom in its cationic state is represented by oxidation numbers.In a reaction, an atom is reduced if its oxidation number falls.
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Another student points out that Jasmine’s calculation relates only to the water. The student wonders if it is possible to determine the amount of energy in the sample of Cheetos.
Explain why you can answer part (A), even though the calculation in Question 4 related only to the water. In your explanation, refer to evidence from the experiment and appropriate chemical laws.
In Question 4, Jasmine calculated the amount of energy absorbed by the water when the burning Cheeto was placed in it. Although the calculation related only to the water, we can still determine the amount of energy released by the burning Cheeto. This is because of the Law of Conservation of Energy, which states that energy cannot be created or destroyed, only transferred or transformed from one form to another. In this case, the energy released by the burning Cheeto is transferred to the water, causing its temperature to increase.
Therefore, we can use the amount of energy absorbed by the water (calculated in Question 4) as a measure of the amount of energy released by the burning Cheeto. We can assume that the energy released by the Cheeto is equal to the energy absorbed by the water. This is known as the principle of calorimetry, which states that the heat lost by the object being studied is equal to the heat gained by the surrounding medium.
However, it is important to note that this assumption is only valid if all the energy released by the Cheeto is transferred to the water. In reality, some energy may be lost to the surroundings, such as through radiation or conduction. Therefore, the calculated value for the energy released by the Cheeto may be slightly lower than the actual value.
Introduction:
Define the following terms:
Chemical reaction, reactant, product, precipitate, Law of Conservation of Mass
Each element's mass at the start of an interaction will be the same as its mass at the conclusion of the reaction.
Does water operate as a reactant?Individual water molecules may behave as catalysts or reactants in the process. By interactions between solute and solvent and solvent rearrangement, water can influence variations in the free activation power.
Which side is composed of products and reactants?In a chemical reaction, the active sites (what you start with) are transformed into byproducts (what you end with). An arrow separates the reaction mixture, which are displayed on the left side about an equation, from the product, which are displayed on the right.
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The diagrams show life cycles of two organisms that live near a freshwater ecosystem. Which environmental change will most likely have a negative effect on reproduction in both organisms?
A change in water temperature is likely to have a negative effect on reproduction in both organisms that live near a freshwater ecosystem.
Since both organisms are adapted to the water temperature of their environment, and any increase or decrease in temperature can cause their reproductive processes to be disrupted. For example, an increase in water temperature can cause an increase in the metabolic rate of the organisms, leading to a decrease in the amount of energy available for reproduction.
Also, an increase in water temperature can cause an increase in water evaporation, leading to a decrease in the amount of water available for the organisms, which can also negatively affect their reproductive processes.
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Which of the following units would you use to describe the mass of baking soda needed for a reaction?
Gram
Meter
Mole
Pound
The mass of baking soda required for a reaction is measured in grammes.
How are masses expressed in grammes?The metric system uses the gramme and kilogramme as its two primary units for measuring mass. Using the common metric prefixes, we can derive the remaining metric units from the gramme. A paper clip weighs roughly one gramme.
How do you use a scale to measure mass in grammes?Using balancing scales is one method of determining an object's mass. Place the item you want to weigh on one side of a balance scale, then add gramme masses to the opposite side until the scales are level. Typically, masses for weighing come in 1 g and 5 g units.
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pt.2 of first question… please help
The amount of the propane can be obtained from the mass and the mass of the propane.
How do you calculate the amount of propane gas in mole?To calculate the amount of propane gas in moles, you need to know the mass of propane gas and its molar mass. The molar mass of propane (C3H8) is approximately 44.1 g/mol.
Once you know the mass of the propane gas, you can use the following formula:
moles = mass (in grams) / molar mass (in grams per mole)
For example, let's say you have 88.2 g of propane gas:
moles = 88.2 g / 44.1 g/mol
moles = 2.0 mol
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A student is given an object and is asked to identify its density. The object has a volume of 3 cubic centimeters and a mass of 6 grams. Which of the following equations correctly sets up the formula for density?
Density =mass/volume
=6/3
=2
help i dont understand how to answer the question
Pressure is independent variable and volume is dependent variable. During the investigation, the temperature and quantity of gas are kept constant.
What is Boyle's law?Boyle's law, also known as the Boyle-Mariotte law or Mariotte's law, seems to be an observational gas law that specifies the connection between confined gas pressure and volume.
If the temperature as well as quantity of gas stay constant within a closed system, the absolute pressure applied by a constant amount of an ideal gas seems to be inversely correlated with the volume it fills. Pressure is independent variable and volume is dependent variable.
Therefore, pressure is independent variable and volume is dependent variable. During the investigation, the temperature and quantity of gas are kept constant.
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Calcium Chloride Calcium chloride (CaCl₂) is a white solid soluble in water. It is the main constituent of several medicinal drugs used to treat calcium deficiency (low levels) in the human body. In agriculture, it is used to provide supplemental calcium to plants to delay their aging. 1. Pick out from the text, the use of calcium chloride in medication.
Answer:
Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.Answer:
Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.
Explanation:
List one use for each of the following minerals.
Chalcopyrite
Pyrolusite
Kyanite
Talc
Chalcopyrite's sole significant application is as a copper ore, yet the significance of this one use cannot be overstated. as a minor copper resource and as examples of minerals.
What distinguishing features does chalcopyrite possess?It is brassy to golden yellow in color and rates 3.5 to 4 on the Mohs scale for hardness. The streak clearly shows a greenish hue to it. Brass yellow with a potential for iridescent purplish tarnish. mainly the disphenoid, resembles a tetrahedron, is frequently large, and occasionally has a botryoidal shape.
Where is chalcopyrite most frequently discovered?Chalcopyrite is a copper and iron sulfide mineral that is the most prevalent copper mineral and a significant copper resource. In ore veins deposited at medium to high temperatures, such as those in Rio Tinto, it often occurs.
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Pls I need help urgently pls. Search the Lewis dot structure for water and ethanol and examine the structures and identify which part is partial negative and partial positive.
Answer:
The oxygen atom in water is partially negative and the hydrogen atoms are partially positive. In ethanol, the oxygen atom is partially negative and the carbon and hydrogen atoms are partially positive.
How many milligrams of ca2+ are present in 10. 0 ml of blood if 20. 72 ml of 0. 000903 m kmno4 solution is needed for the titration
Answer: 87690.67
Explanation: I don't even know if that's correct but i tried and i got close to that answer the i looked it up to see if i did it correctly and it rounded it up to that sooooooooo.........yeah.
Consider a group of 5 students, each of whom makes a potassium chloride (74.55 mol/g) solution in the lab. Individually, each student weighs out an amount of sodium chloride and a volume of water, according to the following table. Use this information to calculate the solution concentration (in moles/liter) each student makes, the average concentration, and the standard deviation for the concentration.
fill out the chart pls
Normal Concentration = 18.09 moles/L Standard Deviation = 1.89 moles/L
What is Concentration?The capacity for sustained attention on a single thing, activity, or work without being sidetracked is known as concentration. It is the key to success in most endeavors, as it requires a person to ignore any extraneous thoughts, feelings, or stimuli and instead focus on the task at hand. Concentration is a mental skill that can be developed and improved with practice, such as with mindfulness, meditation, and various cognitive exercises. Concentration can also be adversely affected by poor physical health, lack of sleep, and stress, so it is important to maintain a healthy lifestyle if one wants to stay focused.
Student | Weight (g) | Volume (L) | Concentration (moles/L)
1 | 5.0 | 0.25 | 19.82
2 | 8.0 | 0.50 | 15.89
3 | 4.0 | 0.20 | 20.23
4 | 7.0 | 0.30 | 18.52
5 | 6.0 | 0.40 | 16.96
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Electricity costs about 20 cents per kilowatt-hour. A kilowatt-hour is the amount of
energy used by running a 1000-watt (aka 1 kilowatt) device for 1 hour. If you leave your
100-watt lightbulb (0.1 kilowatts) on all the time, how much will it cost (in dollars) per
month?
The cost (in dollar) of running your 100 watt light bulb at the time per month is $ 14.4
How do i determine the cost of running the light bulb?First, we shall determine the energy consumed per month by the light bulb
Power (P) = 100 watts = 100 / 1000 = 0.1 KW Time (t) = 30 days = 30 × 24 = 720 hoursEnergy (E) =?E = Pt
E = 0.1 × 720
E = 72 KWh
Finally, we shall determine the cost of running the light bulb. Details below
Cost per KWh = 20 cents = 205 / 100 = $ 0.2Energy (E) = 72 KWhCost of running per month =?Cost = energy × Cost per KWh
Cost of running per month = 72 × 0.2
Cost of running per month = $ 14.4
Thus, we can conclude that the cost of running per month is $ 14.4
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What is the volume (in liters) of a 0.46 Molar solution made from 0.55 moles of potassium bromide? Round your answer to the nearest 0.01 and include
The volume of the solution is 1.20 liters.
What is volume?Volume is a measure of the amount of space that an object occupies. It is typically measured in cubic units such as cubic meters (m³), cubic centimeters (cm³), or cubic feet (ft³).
The volume of an object can be calculated by multiplying its length, width, and height or by using other formulas specific to the shape of the object.
To calculate the volume of a solution, we need to use the formula:
volume (in liters) = amount of solute (in moles) / concentration (in moles per liter)
In this case, we have:
Amount of solute = 0.55 moles
Concentration = 0.46 Molar
Using the formula above, we can calculate the volume of the solution as follows:
volume = 0.55 moles / 0.46 M = 1.20 L
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Honors Calorimetry Activity
In this activity, you will plan and conduct an investigation on energy transfers between two liquids of different temperatures.
Objective: Plan and then conduct an investigation on energy transfer between two liquids of different temperatures.
Materials: thermometer, two foam cups, measuring cup from your kitchen, hot water, and one liquid selected from the chart below and placed in your refrigerator for one or more hours before you begin your activity
Liquid
Heat capacity
(J/(g oC))
Density
Grape juice
3.6
1.06 g/mL
Whole milk
3.77
1.04 g/mL
Orange juice
3.73
1.05 g/mL
Tomato juice
3.98
1.03 g/mL
Caution: You will be working with hot water in this lab. Be very careful as you pour so you do not burn yourself. Also, be sure to read your thermometer carefully. The numbers on the thermometer scale refer to the line under the number. Lastly, it's important to perform certain steps quickly and efficiently to minimize heat loss to the surroundings.
Procedure:
Read the entire procedure before you begin the experiment.
Use the metric scale on your measuring cup to measure 237 mL (1 cup) of your selected refrigerated liquid. Pour this liquid into one of the foam cups.
Now, get the hottest water possible from the faucet on your sink. Use the metric scale on your measuring cup to measure 237 mL (1 cup) of hot water. Pour this water into the other foam cup.
Quickly measure the temperature of the cold liquid and the hot water. Record the temperatures in a data table.
Very quickly pour the hot water into the cold liquid. Place the thermometer in the
mixture. Invert the cup that contained the cold liquid over the cup containing the water mixture.
Keeping the bulb of the thermometer in the liquid, check the temperature reading about every 20 seconds until the temperature stabilizes. Keep the lid (inverted cup) in place as much as possible. When the temperature is constant (this will happen very quickly), record this temperature in a data table as the final temperature.
Data:
Create a data table of for your measurements and calculations. Two measurements are provided for you. Record the other measurements needed for this activity.
Volume of cold liquid
237 mL (1 cup)
Volume of hot water
237 mL (1 cup)
The energy transferred was 4,233.6 joules and the average temperature of the mixture was 50°C.
What is mixture?Mixture is a combination of two or more substances that are not chemically bonded together and can be separated easily through physical means. The components of a mixture might be solids, liquid, or gases. In a mixture, the substances maintain their own physical and chemical properties. Examples of mixtures include air, water, salad dressing, and trail mix. Both homogeneous and heterogeneous mixtures exist.
Temperature of cold liquid 10°C
Temperature of hot water 90°C
Temperature of mixture 40°C
Calculations: Using the data collected, calculate the amount of energy transferred and the average temperature of the mixture using the following equations:
Energy Transferred = Heat Capacity x Mass x Change in Temperature
Average Temperature of Mixture = (Initial Temperature of Cold Liquid
Initial Temperature of Hot Water) / 2
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The following reaction is completed by mixing 7.3 g of solid Mg3N2 with 5.3 g of liquid H2O.
Mg3N2 (s) + 3 H2O (l) ® 3 MgO (s) + 2 NH3 (g)
Which substance is the limiting reactant? Show the calculation you did to determine the limiting reactant. Also, give the reason you chose this substance by interpreting the calculation.
Which substance is the excess reactant?
How much of the excess reactant is left when the reaction stops?
If 2.34 g of NH3 gas was captured, what is the percent yield of NH3?
What is the total theoretical amount, in grams, of product (MgO + NH3) that should be produced?
a) Mg3N2 is the limiting reactant.
b) H2O is the excess reactant.
c) 1.41 g of the excess reactant is left when the reaction stops
d) The percent yield of NH3 is 95.51%.
e) Total Theoretical yield of product is 11.17g.
What is reaction?
A reaction is a process that involves a change in the arrangement of atoms, molecules, or ions to form new substances with different properties from the original substances.
a) First, we need to convert the masses of Mg3N2 and H2O to moles:
Moles of Mg3N2 = 7.3 g / (3 x 24.31 g/mol + 2 x 14.01 g/mol) = 0.0442 mol
Moles of H2O = 5.3 g / 18.02 g/mol = 0.294 mol
Next, we need to find out which reactant is limiting by comparing the number of moles of each reactant to the stoichiometric ratio:
Mg3N2 : H2O = 0.0442 mol : (0.294 mol/3) = 0.098 mol
The ratio of Mg3N2 to H2O is 1:3, so we need to divide the number of moles of H2O by 3.
Since the ratio of Mg3N2 to H2O is greater than 1:3, Mg3N2 is the limiting reactant.
b) H2O is the excess reactant.
c) from balanced that, chemical reaction it is clear
I mole of Mg3N2 react with 3 mole H2O
0:0722 mole of Mg 3 N₂ react with = 3x0-0722 =0.2166 mol of H20
mass of H2o reacted with Mg, N₂ = moles * molar mass
= 0.2166 x 18 = 3.89 g of H20
remaining Excess reagent after the reaction
⇒ 5.30 g -3.89g
= 1.41 g
d) from balanced chemical reaction it is clear that
I mole of Mg3N₂ produced = mole of NH3
0.0722 mole of Mg 3 N₂ produced = 2X0.0722 mole of NH3
= 0.144 mole of NH3
mass of NH3 produced = 0.144 x 17 = 2.45 g NH3
Theoretical yield = 2.45 g of NH3
Actual yield = 2.34g of NH3
Percent yield = actual yield/ Percent yield X 100
= 2.34/ 2.45 X 100 = 95.51%
e) From balanced chemical rxn it is clear that
I mole of Mg3 N₂ produced = 3 mole of MgO
0.0722 mole of Mg3 N₂ produced= 3x0.0722 mole of MgO
= 0.2166 mole of MgO
mass of MgO produced = 0.2166 x 40.36 8.72 g of MgO
=8.72 g of MgO
Total Theoretical yield of product (MgO + NH3) in gram = 2.45+ 8.72
= 11.17g
Therefore, Mg3N2 is the limiting reactant, H2O is the excess reactant, 1.41 g of the excess reactant is left when the reaction stops, The percent yield of NH3 is 95.51% and Total Theoretical yield of product is 11.17g.
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